Gas cigarette lighter



Feb. 6, A196s P. RABE ETAL GAS CIGARETTE LIGHTER 'Filed May 5, 1966 l Inventors PM ma@ W5 United States Patent O 3,368,111 GAS CIGARETTE LIGHTER Peter Rabe, Muhlheirn (Main), and Horst Dieterle, Frank-` The present invention relates to a gas cigarette lighter having a burner, electrical igniting means, for instance a pair of electrodes forming a spark gap therebetween above the outlet end of the burner, means mounting the electrodes at a proper distance from the outlet end of the burner, and throttling means for regulating the gas passing through the burner, in which the throttling means are regulated from the outside by means of an operating member.

In gas lighters of the aforementioned kind, the operating member for adjusting the throttling means may extend at a location distant from the burner through the housing of the lighter. Such a construction will necessarily be rather complicated. Another possibility is to arrange the operating member for the throttling means as a laterally extending lever in the region of the burner. Such a construction has the disadvantage that the various elements in the region of the burner are located so close together that they are liable to interfere with each other. In such a construction there exists also the danger that during adjustment of the operating lever the fragile electrodes of the igniting means may be accidentally bent.

It is an object of the present invention to overcome the disadvantages of cigarette lighters of the aforementioned kind.

It is a further object of the present invention to provide a cigarette lighter of the aforementioned kind in which the throttling means of the lighter may be conveniently adjusted without the danger of displacing during such an adjustment tbe relative position between the burner and the electrodes of the igniting means.

It is an additional object of the present invention to provide a lighter of the aforementioned kind which is composed of relatively few and simple parts so that the lighter may be manufactured at reasonable cost and stand up trouble-free under extended use.

With these objects in view, the lighter according to the present invention mainly comprises tank means adapted to contain a combustible gas under pressure, tubular burner means having a longitudinal axis, an inlet and an outlet end, passage means providing communication between said tank means and said inlet end of said burner means so that gas under pressure may ow from the tank means to the outlet end of the burner means, adjustable throttling means in the aforementioned passage for throttling flow of gas through the latter, having an operating portion substantially coaxial with the axis of the burner means and being adjustable by turning the operating portion about the aforementioned axis, electrical igniting means having active portions for igniting gas emanating from the outlet end of the burner means, and mounting means mounting the active portions of the igniting means upwardly spaced a fixed distance from the outlet end of the burner means, wherein the mounting means have a lower coupling portion substantially coaxial with the aforementioned axis and connected to the operating portion of the throttling means so that the latter may be turned for adjustment by means of said mounting means.

By coupling the mounting means of the igniting means, which may for instance comprise a pair of electrodes forming a spark gap therebetween, to the oper-ating portion of the throttling means so that the latter may be adjusted by turning the mounting means about the axis of the burner means, a separate additional member for adjusting the throttling means becomes unnecessary and the construction of the lighter greatly simplified. Nevertheless the necessary exact position of the ignition means, or the spark gap between the electrodes, relative to the outlet end of the burner will not be disturbed during such an adjustment, since adjustment of the throttling means is produced simply by turning the mounting means about the axis of the burner means and the burner means may be xedly connected to the mounting means so as to turn therewith.

An especially advantageous construction is derived when the mounting means of the electrodes extend at least up to and preferably beyond the elevation of the spark gap between the electrodes. The mounting means have preferably a pair of opposite wall portions from which the electrodes respectively inwardly project and these wall portions define between themselves an opening aligned with the outlet end of the burner means. The mounting means of the electrodes may have an upper ring-shaped portion from which the electrodes project inwardly but other constructions are also possible, for instance, the mounting means of the electrodes may be U-shaped and the electrodes may project inwardly from opposite legs of the U-shaped mounting means.

In such constructions it is possible to grasp the upper end of the mounting means for turning `the latter about the axis of the burner means to thus adjust the throttling means without the danger of accidentallyA bending thereby the electrodes.

In a preferred construction, the mounting means of the electrodes surround the burner means and have an annular engaging portion tightly eng-aging a portion of the latter so that the burner means is constrained to turn with the mounting means during adjustment of the throttling means.

The operating portion of the throttling means may be in form of a bushing threadedly connected to the tank. The bushing preferably extends with anupper portion thereof beyond the tank and the coupling portion of the mounting means is connected to the upper portion of the bushing so that the latter is turned during turning of the mounting means.

The coupling portion of the mounting means may be mounted axially slidable on the upper portion of the bushing so that the mounting means and the tubular burner means connected thereto may be moved in axial direction to open and close valve means in the passage means. The valve means may comprise a valve seat coaxial with the axis ofthe burner means and a movable valve member connected to the burner means.

The operating portion of the throttling means may have an upper end of hexagonal cross-section and the coupling portion of the mounting means may be formed with a cavity of corresponding cross-section so that the coupling portion and the operating portion may be connected t0 each other in a plurality of angularly displaced positions. On the other hand, the upper end of the operating' portion of the throttling means may be formed with an external gear toothing and the coupling portion of the mounting means may be formed with a cavity having a corresponding internal toothing adapted to mesh with the external gear toothing on the upper end of the operating portion of the throttling means. This permits a rough adjustment of the throttling means without the necessity of excessively turning the mounting means of the electrodes and the conductors connected to the latter.

For a simple and quick assembly and disassembly7 it is preferred to form the mounting means of the electrodes from at least two parts, for instance a lower annular p art having a pair of oppositely arranged upwardly projecting portions and an upper part engaging outer surfaces at the upper ends of said upwardly projecting portions. In th1s arrangement the electrodes may be respectively clamped in channels formed between the inner surface of the upper ring part and the outer surface at the upper ends of the projecting portions. Furthermore, each of the upwardly projecting portions may be formed at the outer surface thereof with a groove for receiving conductors connected to the electrodes and these conductors may be covered by a pair of downwardly projecting portions on the upper ring part respectively extending over the grooves.

On the other hand the mounting means of the electrodes may be formed from a single component provided with a pair of channels for mounting the electrodes and the conductors connected thereto and the remaining space in the aforementioned channels may be lled with a hardenable resin after the electrodes and conductors are placed there- According to a further feature according to the present invention, the mounting means may be made from insulating material having a limited heat resistance and in such an arrangement the lighter preferably includes shield means located above the ignition means or electrodes and being formed with an opening therethrough located in the path of the stream of gas emanating from the outlet end of the burner means, in which the opening has a crosssection permitting ignited gas to pass therethrough while preventing a flame forming above the shield means to flash back in downward directon through the opening.

The mounting means for the electrodes may also be formed with a bore therethrough having an upper end located downwardly spaced from the electrodes and a lower end and the passage means may in `this case communicate with the lower end of the bore so that the upper end thereof forms the outlet end of the burner means.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 is a partial, partially sectioned side view illustrating a cigarette gas lighter according to the present invention;

FlG. 2 is a partial cross-sectional view drawn to an enlarged scale and illustrating the burner arrangement with the throttling means and the mounting means of the electrical igniting means of the arrangement shown in FIG. l;

FIG. 3 is a cross-section taken along the line A-A of FIG. 2; and

FIG. 4 is a partial perspective view and showing a further embodiment of a lighter construction according to the present invention.

Referring now to the drawings, and more specifically to FIG. l, it will be seen that the lighter according to the present invention mainly comprises a housing 1 which is preferably covered by -a metal shell 2. A cap-shaped shielding member 3 projects from the upper end of the housing 1 preferably removably connected thereto. A movable pusher member 6, likewise covered by a cap 5, is arranged laterally from the cap 3, projecting upwardly from the housing 1, and a two-armed lever 8 pivoted about a pivot axis 7 is connected to the pusher member 6 in such a manner that when the latter is pushed downwardly, the fork-'shaped end 9 of the lever 8 is moved in upward direction for a purpose which will be described later on. During downward movement of the lpusher member 6 the electrical igniting means of the lighter will also be Cir energized in the manner as will be described later on. The lighter further includes a tank 11i lled with compressed combustible gas in liquied form and burner means 11 communicate with the interior of the tank 10, while mounting means 12 which carry the electrical igniting means for igniting the gas emanating from the burner surround the latter as schematically illustrated in FIG. l.

FIGS. 2 and 3 illustrate the above-described arrangement in further detail. As can be seen from FIG. 2, the upper wall 13 of the tank 10 is formed with an opening provided with an inwardly projecting tubular portion 14. The tubular portion 14 is formed with an inner screw thread into which a cup-shaped socket member 16 is threaded, whereby an annular sealing member 15 located between an upper ange of the socket member 16 and a corresponding porton of the upper wall 13 of the tank 10 provides a proper seal between the tank and the socket member 16. A valve seat 1S projects upwardly from the bottom wall of the socket member 16. A mass of throttling material 20 constituted `by a porous compressible material is located in the annular space between the valve seat 1S and the peripheral wall 19 of the socket member 16. The mass 20 may be compressed between the bottom wall 17 of the socket member 16 and an annular member 21. The latter abuts against the lower end of a bushing 22 which by means of an outer screw thread 23 is threadingly connected to the socket member 16 and an upper portion thereof is sealed by a sealing member 24 against the socket. An opening 25 is provided in the peripheral wall 19 of the socket member 16 and compressed gas from the interior of the tank 10 may pass through this opening 25, the clearance around the screw thread 23 and the throttling mass 20 into the valve chamber 26. An annular disc 27 of elastically compressible material engages, in the position shown in FIG. 2, the valve seat 18. The annular disc 27 abuts against a ange of a burner tube 29, which under :the influence of a coil compression spring 30, abutting with its upper end against a shoulder of the bushing 22 and with its lower end against the flange 28, is resiliently pressed in downward direction so that the annular disc 27 sealingly engages the valve seat 18. When the burner tube 29 is axially moved in upward direction, the valve 18, 27 is opened so that gas may flow from the valve chamber 26 into the axial bore 31 of the burner tube 29.

The opening 25, the clearance about the screw thread 23 and the valve chamber 26 constitutes therefore a passage means providing communication between the interior of the tank 10 and the inlet end of the bore 31 through the burner tube 29. The throttling means located in this passage are constituted by the throttling mass 20, the annular member 21 and the adjustable bushing 22. The bushing 22 forming the operating portion of the throttling means has a head portion 32 projecting beyond the wall 13 of the tank and the head portion 32 has an unround, for instance a hexagonal cross-section. A burner tube extension 45 is arranged coaxially with the burner tube 29 and the upper end of the latter extends with a press t in a corresponding enlarged bore portion of the tubular extension 45. The bore through the latter is axially aligned with the bore 31 of the burner tube 29 and the bore through the tube extension 4S has at the upper end an Outlet end 47 0f preferably enlarged diameter. The tubes 22 and 45 constitute the burner means of the lighter according to the present invention through which a stream of gas from the tank 111 may pass in upward direction when the valve is open.

The lighter according to the present invention includes further electrical igniting means for igniting a gas emanating from the outlet end 47 of the burner means. The electrical igniter means have acting portions preferably in the form of a pair of electrodes 41, the free ends of which are arranged spaced from each other and on opposite sides of a stream of gas adapted to emanate from the outlet end 47 of the burner means. The electrodes 41 are mounted in a fixed position relative to the outlet end of the burner means on mounting means 12 which may comprise, as shown in the embodiment illustrated in FIGS. 2 and 3, an upper annular part 33 with a pair of downwardly projecting oppositely arranged portions 34 and a serrated peripheral outer surface 35, and a lower connecting part which comprises a coupling ring 36 having a downwardly projecting portion formed with a cavity of hexagonal cross-section so as to t on the hexagonal head 32 of the bushing 22 and a pair of upwardly projecting oppositely arranged longitudinal portions 37. The upwardly projecting portions 37 detine between the upper ring 33 and the lower ring 36 a pair of openings 38 through which combustion air -may pass into the space about the burner tube extension 45. The upper ring 33 engages with the inner surface thereof, upper outer surface portions of the upwardly extending projecting portions 37 in the manner as best shown in FIG. 3. Channels 40 are formed between the two parts of the mounting means and each of the channels 40 comprises a substantial vertical portion 40a and a substantial horizontal portion 40h in which when the aforementioned two parts of the mounting means are engaged with each other the electrodes 41 are respectively clamped. The upwardly projecting portions 37 are further provided each with a groove 42. Conductors 43, indicated in dotted lines in FIG. 2, which respectively connect the electrodes 41 to a non-illustrated transformer of the igniting means are arranged in the grooves 42. The conductors 43 are covered by the portions 34 projecting downwardly from the upper ring 35.

The mounting means 12 for the electrodes 41 have between the opposite ends thereof an engaging portion 44 formed with a central bore therethrough through which the lower portion of the burner tube extension 45 extends with a press fit so that the tube 45 is constrained to follow the movements of the mounting means of the electrodes, and since the burner tube 29 is press fitted with the upper end thereof into the lower end of the tube 45, the burner tube 29 will also follow movements of the mounting means. The forked end 9 of the lever 8 is pivotally connected in a known manner to the tube 45 and the coupling portion 36 is mounted on the head 32 of the bushing 22 with a slide lit so that the electrode mounting means 12 and the burner tubes 45 and 29 may be moved in axial direction relative to the bushing 22.

The lighter arrangement above described will operate as follows:

When the pusher member 6 is depressed, the lever 8 will be tilted in clockwise direction about its axis 7 and the forked end 9 of the lever member will thereby be raised to thus raise the burner tubes 45 and 29 together with the electrode mounting means 12, whereby the valve 18, 27 is opened so that compressed gas from the interior of the tank may flow through the aforementioned described passage means through the burner tubes 29 and 45 to escape through the outlet end 47. Depression of the pusher member 6 closes at the same time in a known manner the electrical circuit connected to the electrodes 41 so that a spark will form between the opposite ends of the latter, igniting thereby the gas emanating from the outlet end 47 of the burner means. Since during the raising of the burner tubes 45 and 29 and opening of the valve, the .mounting means 12 of the electrodes will be likewise raised, the distance of the ends of the electrodes 41 from the outlet end 47 of the burner means will not be changed. When the pusher member 6 is released, the spring 30 will move the burner tube 29 and the elements connected thereto in downward direction to cause closing of the valve.

If it is desired to adjust the throtling means, the cap 3 is removed from the lighter and the electrode mounting means 12 are gripped at the serrated peripheral portion 35 thereof and turned. This turning is transmitted by means of the aforementioned described construction to the bushing 22 which is thereby, due to the thread connection 23 with the socket member 16, axially displaced so that the throttling mass 20 will be more or less compressed. The electrodes 41 are protected from accidental engagement and any damage during such an adjustment, since the mounting means 12 of the electrodes project upwardly beyond the elevation of the latter and since the projecting portions of the electrodes 41 are arranged in the space 46 protected by the upper ring 33 of the mounting means.

A rough adjustment of the throttling means may be carried out in the plant before final assembly of the lighter, that is before mounting the mounting means 12 of the electrodes on the head 32 of the bushing 22, by manual turning the bushing through a necessary angle in order to properly compress the throttling mass 20. Subsequently thereto the coupling portion of the mounting means 12 is pushed on the hexagonal. head 32 of the bushing 2()` and line adjustment of the throttling means is then carried out by turning the mounting means 12 through a small angle. Of course the portions of the conductors 43 outside the mounting means 12 have to be flexible and provided with the necessary slack to permit a turning of the mounting means 12.

FIG. 4 partly illustrates another embodiment of a lighter according to the present invention. The upper wall 13 of the tank 10` and the socket 16 may be arranged and connected to each other in the manner as described in conection with FIG. 2. The head 48 of the bushing 22 forming the operating portion of the throttling means is however provided with a serrated periphery or an external gear toothing which meshes with and is tightly engaged in a corresponding internal gear toothing provided on opposite surface portions at the lower end of an electrode mounting means 49 of substantially H-shaped configuration. The burner tube 29 is in this arrangement press fitted into a central bore Sti formed in the mounting means 49 so that the upper end of the bore 5) forms the outlet end of the burner means. The upwardly extending legs of the H-shaped mounting means 49 respectively carry the two inwardly projecting electrodes 51. The legs are formed with channels 53 therethrough, through which the conductors S2 extend connecting the electrodes 51 to an electric circuit for energizing the electrodes when ignition of the gas emanating from the outlet end .S0 of the burner means is desired. The space in the channels 53 is, after the electrodes 51 and the conductor 52 are inserted therein, preferably lilled with a hardenable resin 54. It is to be understood that the arrangement only partially illustrated in FIG. 4 includes otherwise valve means, throttling means, and means for axially shifting the mounting means 49 and the burner tube connected thereto in the manner as described before in connection with FIG. 2. The arrangement illustrated in FIG. 4 also permits to easily adjust the throttling means by gripping the mounting means 49 with the fingers and turning the mounting means through a small angle. During such an adjustment the electrode 51 will be protected from accidental damage.

When the electrode mounting means 12 or 49 are mounted beneath cap-shaped shield means 3, as shown in FIG. 1, the electrode mounting means may be formed from plastic material having a low heat resistance, since the opening 4 in the cap 3 has a cross-section so as to permit passage of ignited gas upwardly therethrough so as to form a llame 53 above the cap 3 and the cross-section is dimensioned in such a manner to prevent ashback of the llame 53 in downward direction into the cap. Heat will be transmitted to the cap 3 from the flame 53 only by radiation and the thus transmitted heat will be dissipated partly by heat conduction and partly by radiation so that the space in the interior of the cap will be heated only to a very small extent. The electrode mounting means will therefore come in contact with the llame only during the very short period of `ignition and this short contact will not detrimentally effect the mounting means formed of plastic material of low heat resistance.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of gas cigarette lighters differing from the types described above.`

While the invention has been illustrated and described as embodied in a gas cigarette lighter wih adjustable throttling means7 it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

For instance the valve of the lighter may be arranged in a different manner as described above and the throttling means may be arranged downstream of the valve instead of upstream thereof as illustrated.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A lighter comprising, in combination, tank means adapted to contain a combustible gas under pressure; burner means having a longitudinal axis, an inlet and an outlet end; passage means providing communication between said tank means and said inlet end of said burner means so that gas under pressure may flow from said tank to said outlet end of said burner means; adjustable throttling means in said passage for throttling flow of gas through the latter, said throttling means having an operating portion substantially coaxial with said axis of said burner means and being adjustable by turning said operating portion about said axis; igniting means having active portions for igniting gas emanating from said outlet end of said burner means; and mounting means mounting said active portions of said igniting means upwardly spaced a fixed distance from said outlet end of said burner means, said mounting means having a lower coupling portion substantially coaxial with said axis and being connected to said operating portion of said throttling means so that the latter may be turned by means of said mounting means.

2. A lighter as set forth in claim 1, wherein said electrical igniting means include a pair of electrodes forming said active portion of the igniting means, said electrodes having opposite ends transversely spaced from each other and respectively to opposite sides of a stream of gas emanating from said outlet end of said burner means and forming a spark gap between themselves, and means connected to the electrode for producing a spark in said spark gap.

3. A lighter as set forth in claim 2, wherein said mounting means extend at least up to the elevation of said spark gap and having a pair of opposite wall portions from which said electrodes respectively inwardly project, said wall portions defining between themselves an opening substantially aligned with said outlet end of said burner means.

4. A lighter as set forth in claim 3, wherein said mounting means have an upper ring-shaped portion from which said electrodes project inwardly, said ring-shaped portion extending upwardly beyond said electrodes.

S. A- lighter as set forth in claim 4, wherein said mounting means surround said burner means and have an annular engaging portion tightly engaging a portion of said tubular burner means.

6. A lighter as set forth in claim 5, wherein said mounting means are formed between said engaging portion vand said upper ring-shaped portion thereof with at least one opening permitting air to pass through said opening into the space between lthe mounting means and the tubular burner means.

7. A lighter as set forth in claim 5, wherein said operating portion of said throttling means is in the form of a bushing threadingly connected to said tank means, said bushing extending with an upper portion thereof beyond said tank means and said coupling portion of said mounting means being connected to said upper portion of said bushing so that the latter is turned during turning of said mounting means.

8. A lighter as set forth in claim 7 and including valve means in said passage means, said valve means comprising a valve seat and a movable valve member connected to said burner means for movement therewith, said coupling portion of said mounting means being axially slidable on said upper portion of said bushing so that said mounting means and said tubular burner means connected thereto through said engaging portion may be moved in axial direction to open and close said Valve means; and operating means connected to said tubular burner means for moving the latter and said mounting means in said axial direction.

9. A lighter as set forth in claim 8, wherein said operating means include a lever having a forked end connected to said tubular burner means and extending through an opening in said mounting means to the outside of the latter.

10. A lighter as set forth in claim 1, wherein said operating portion of said throttling means has an upper end of hexagonal cross-section and wherein said coupling portion of said mounting means is formed with a cavity of corresponding cross-section so that said coupling portion and said operating portion may be connected to each other in a plurality of angularly displaced positions.

11. A ligh'ter as set forth in claim 1, wherein said operating portion of said throttling means has an upper end formed with an external gear toothing and wherein said coupling portion of said mounting means is formed with a cavity having an external gear toothing meshing with said external gear ltoothing on said operating portion of said throttling means so that said coupling portion and said operating portion may be connected to each other in a plurality of angularly displaced positions.

12. A lighter as set forth in claim 2, wherein said mounting means include at least two parts, a lower annular part having a pair of oppositely arranged upwardly projecting portions and an upper ring part engaging outer surfaces at the upper ends of said upwardly projecting portions, said electrodes being respectively clamped in channels formed between the inner surface of said upper ring part and said outer surface at the upper ends of said upwardly projecting portions.

13. A lighter as set forth in claim 12, wherein each of said upwardly projecting portions is formed at the outer surface thereof with a groove, and including conductor means connected to said electrodes in each of said grooves, and a pair of downwardly projecting portions of lsaid upper ring part respectively extending over said groove and covering the conductor means located therein.

14. A lighter as set forth in claim 2, wherein said mounting means include a single part formed with a pair of channels for mounting said electrodes and including conductor means connected to said electrodes and being at least partly arranged in said channels, and a hardenable resin filling the space in said channels about said conductor means.

1S. A lighter as set forth in claim 1, wherein said mounting means are made from insulating material having a low heat resistance, and wherein said lighter includes shield means located above said igniting means and being formed with an opening therethrough located in the path of the stream of gas emanating from said outlet end of said burner means, said opening having a crosssection permitting ignited gas to pass upwardly through said opening so that a ame will form above said shielding means, while preventing the flame to ash back in downward direction through said opening.

16. A lighter a-s set forth in claim 1, wherein said mounting means are formed with a bore therethrough having an upper end located downwardly spaced from said igniting means, and a lower end, said passage means communicating with the lower end of Isaid bore and said upper end thereof forming said outlet end of said burner means.

References Cited UNITED STATES PATENTS RCHARD M. WOOD, Primary Examiner.

10 VOLODYMYR Y. MAYEWSKY, Examiner. 

1. A LIGHTER COMPRISING, IN COMBINATION, TANK MEANS ADAPTED TO CONTAIN A COMBUSTIBLE GAS UNDER PRESSURE; BURNER MEANS HAVING A LONGITUDINAL AXIS, AN INLET AND AN OUTLET END; PASSAGE MEANS PROVIDING COMMUNICATION BETWEEN SAID TANK MEANS AND SAID INLET END OF SAID BURNER MEANS SO THAT GAS UNDER PRESSURE MAY FLOW FROM SAID TANK TO SAID OUTLET END OF SAID BURNER MEANS; ADJUSTABLE THROTTLING MEANS IN SAID PASSAGE FOR THROTTLING FLOW OF GAS THROUGH THE LATTER, SAID THROTTLING MEANS HAVING AN OPERATING PORTION SUBSTANTIALLY COAXIAL WITH SAID AXIS OF SAID BURNER MEANS AND BEING ADJUSTABLE BY TURNING SAID OPERATING PORTION ABOUT SAID AXIS; IGNITING MEANS HAVING ACTIVE PORTIONS FOR IGNITING GAS EMANATING FROM SAID OUTLET END OF SAID BURNER MEANS; AND MOUNTING MEANS MOUNTING SAID ACTIVE PORTIONS OF SAID IGNITING MEANS UPWARDLY SPACED A FIXED DISTANCE FROM SAID OUTLET END OF SAID BURNER MEANS, SAID MOUNTING MEANS HAVING A LOWER COUPLING PORTION SUBSTANTIALLY COAXIAL WITH SAID AXIS AND BEING CONNECTED TO SAID OPERATING PORTION OF SAID THROTTLING MEANS SO THAT THE LATTER MAY BE TURNED BY MEANS OF SAID MOUNTING MEANS. 